The border station is remotely operated, meaning citizens entering the U.S. will have their passports scanned and be interviewed by phone by Customs and Border Protection officers in El Paso, Texas. Before that, citizens of both countries walked across the Rio Grande and people took that back-and-forth for granted.

Four senior U.S. Border Patrol agents cross the Rio Grande at Big Bend National Park, Texas as a crowd gathers to greet them on the Mexican side. (Photo by Lorne Matalon)

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U.S. Border Patrol agents — their weapons left on the U.S. side of the Rio Grande — meet with the Mexican military in Boquillas, Mexico. (Photo by Lorne Matalon)

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The commander of the local Mexican military garrison stands on the southern side of the Rio Grande looking back at the U.S. side in Boquillas, Mexico. (Photo by Lorne Matalon)

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Victor Valdez, who for years has entertained Americans as he sings at the river in the village plaza in Boquillas, Mexico. (Photo by Lorne Matalon)

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A U.S. Border Patrol agent speaks with the Mexican military commander. It is unusual to see American agents on the ground in Mexico in a public setting. For the visit, U.S. agents left their weapons at home. (Photo by Lorne Matalon)

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The Mexican flag is raised on the village plaza in Boquillas, Mexico. (Photo by Lorne Matalon)

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Catarino Oreste Vasquez, 70, says village residents are yearning for visitors now that the border crossing has opened. (Photo by Lorne Matalon)

Two cousins in the village plaza in Boquillas, Mexico. (Photo by Lorne Matalon)

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A young horse jockey waits by the Rio Grande to take visitors from the shoreline into the village a few minutes away. Only the boat in the background is allowed to cross back and forth in Boquillas, Mexico. (Photo by Lorne Matalon)

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A man illegally in the U.S. stands by the Rio Grande and sells walking sticks in Big Bend National Park, Texas. (Photo by Lorne Matalon)

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The man prepares to cross the Rio Grande back to Boquillas, Mexico. (Photo by Lorne Matalon)

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The man crosses the Boquillas Canyon as he returns to Mexico. (Photo by Lorne Matalon)